Sherline 1043 3-Jaw Self-centering Wood Lathe Chuck
This chuck is identical to our P/N 1040 self-centering chuck except that it has a 1"-8 TPI thread that accommodates most wood-working lathes. Because this chuck was initially designed for machine-lathe work, its accuracy far exceeds what is necessary for general wood turning. It has a clamping range of 3/32" (2 mm) up to 1-3/16" (30 mm) diameter with the jaws in the normal position. With the jaws in the reversed position, work up to 2-1/4" (56 mm) can be gripped. The hole through the chuck is .687" (17 mm). Rotating the knurled ring closes all three jaws simultaneously to quickly grip round or hexagonal stock. Tommy bars (provided) are used in the holes in the side to tighten and loosen the chuck for more leverage.
Sherline technicians custom grind each jaw to fit its own slot with as little play as possible. Grinding is done to within .0001". This assure maximum accuracy. If you have sent in an old chuck for jaw replacement or are replacing an old, worn chuck, you will notice that the new one is initially harder to turn than your worn one. As chucks wear, they become looser and easier to turn. Some users like a chuck that turns easily right from the start for quick part changes, where maximum accuracy is not as important as speed and ease of use. In your preference, Sherline makes and sets aside a certain number of chucks with less tightly fit jaws. If your job calls for repetitive, quick part changes and you can accept a little less centering accuracy, you may request one of these chucks at no extra charge. To do so you must place your order directly with Sherline by phone and ask for loose jaws, or if ordering from www.sherlinedirect.com, add a note in the "Comments/Shipping Preferences" box on the order for requesting "Loose Jaws on Chuck".